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O v e r v o l t a g e / S u p p r e s s i o n P r o t e c t i o n
™
Surgector Transient Voltage Suppressors
SGT (TO-202) Series
Features
Bidirectional Surge Suppressors:
(SGT 23B13, SGT 27B13, SGT 27B27)
Gate Controlled Unidirectional Surge
Suppressors: (SGT 27S10, SGT 27S23)
•
Constructed with a thyristor whose gate
contains a special diffused section
which acts as a zener diode
•
Fast turn-on, high holding
current thyristors
•
Provides excellent voltage limiting,
even on very fast rise time transients,
when coupled with a user supplied
voltage level detector
•
•
Zener diode section permits anode
voltage turn on of the structure
Packaging: Modified TO-202
•
•
High holding current allows for
return to a high impedance off state
after a transient
Unidirectional Surge Suppressors:
(SGT 03U13, SGT 06U13, SGT 23U13)
Packaging: Modified TO-202
•
•
Offers unidirectional clamping action
Designed to protect telecommunications
equipment, data links, and other
sensitive electrical circuits from damage
by transients, lightning strikes, load
changes, and power line crosses
•
Packaging: Modified TO-202
Specifications
Bidirectional
Off-State Off-State
Current
(max)
Current Reverse Reverse Clamping
Main
(max)
Current Current
Voltage
Breakover Holding On-State
Terminal
Part #
@25°C
200nA
200nA
200nA
@85°C
@25°C
@85°C (min/max)
Voltage
Current Voltage Capacitance
SGT 27B27
SGT 23B13
SGT 27B13
100µA
100µA
100µA
—
—
—
—
270V/325V
230V/270V
270V/325V
345V
270mA
130mA
130mA
2V
2V
2V
80pF
50pF
50pF
—
240V
—
345V
Unidirectional
SGT 03U13
SGT 06U13
SGT 23U13
50nA
50nA
50nA
10µA
10µA
10µA
1mA
1mA
1mA
10mA
33V/ —
60V/ —
230V/ —
50V
85V
130mA
130mA
130mA
2V
2V
2V
90pF
90pF
90pF
10mA
10mA
275V
Gate Controlled Unidirectional
SGT 27S10
SGT 27S23
100nA
100nA
50µA
50µA
—
—
—
—
—
—
285V
285V
100mA
230mA
2V
2V
90pF
90pF
Ordering Information
SGT 10 S 10
Holding current in mA divided by 10
Type of Surgector (U = Unidirectional B = Bidirectional S = SCR)
Off-state voltage rating divided by 10
Consult Littelfuse web site for more information
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